Traditional patch leads are not set up to transmit the amount of button data required for analogue learning-style units and this can cause problems, especially for vehicles with many different buttons or scroll wheels. With the SMARTPL, the analogue range is extended and optimised for the stereo, allowing all of the steering wheel buttons - including wheels and dials - to be programmed to the user chosen functions. Simply connect the smart patch lead to the interface and the vehicle, access the SWC learning mode on the stereo, and program the steering wheel controls buttons as desired